Strippit Houdaille HECC80/1 Control
Circuit Board Types & Usage
Note #1.    Strippit Houdaille Circuit Boards have 2 Numbers on them.   The "Odd" Number is for a  Raw-Blank Circuit Board with No Parts on it,  and is of No Interest to You or Us.    The  "Even"  Number is for a  Finished Assembly Circuit Board.
Example,  the  "Odd"  Number  #400635-xxx  is for a Blank CPU Circuit Board.   We are Interested Only in the  "Even"  #400636-xxx  Finished Assembly CPU Board Number.

Note #2.    Many Early Circuit Boards were Poorly-Marked or Not-Marked Correctly at All.
Also,  Many Board-Types were Modified & Changed & Swapped in the Field,  and the New Dash-Number  (-xxx) Type was Often Not Updated,  Leading to Much Confusion.

Note #3.    Strippit Made Many Different Versions of some of these Boards that are Very Similar,  But are Not The Same!   Pay Attention to the  ( -xxx )  Dash Numbers at the End!

Note #4.    HECC80/1 & HECC80/3 Type Circuit Boards Are Very Similar,  But Are Not the Same!    If You have More than 1 HECC80 Control Machine,  Do Not Mix up the Boards!
CPU Board

#400636-100   Standard CPU  Set-Up for
                        20-ma Current-Loop Interface
#400636-232   Standard CPU  with RS-232 Interface

Comes in above 2 Types.  The Only Difference is the -100 Type can Interface to Defunct Teletype ASR33 Printer/Punches (which I have seen used once in 29 years!)  and the -232 Type can Communicate to P.C. Computers through it's RS232 Port.
The -100 Type can be Converted to the -232 Type.

CPU Boards are Only Used in Cardcage Slot #2.
The CPU is the "Brain" of the Control,
if it's Not Working,  Nothing Will Work!
In Normal Operation,  the CPU Board has
2 Green-LED Lights  "On" & 3 Red-LED Lights  "Off".
Prom #1  &  Prom #2 Boards
Sets of  2 Prom Boards Store the Executive-Run Program that Runs Control & Machine.   Prom 1 Board
goes in Slot #3  &  Prom #2 Board in Slot #4.  
Here are a Few of Many Versions of these Boards;

#400478-300   HECC80/1 Prom #1
#400478-400   HECC80/1 Prom #2
#400478-422   HECC80/1 Prom #2 LaserTool Option

#400478-320   HECC80/102 Prom #1
#400478-420   HECC80/102 Prom #2
#400478-424   HECC80/102 Prom #2 LaserTool Option

#400478-350   HECC80/28 Prom #1 LaserTool
#400478-450   HECC80/28 Prom #2 Lasertool

#400478-370   HECC80/28 Prom #1 Turbo-Lasertool
#400478-470   HECC80/28 Prom #2 Turbo-Lasertool

#400478-700   HECC80/750 Prom #1
#400478-800   HECC80/750 Prom #2

#400478-720   HECC80/752 Prom #1
#400478-820   HECC80/752 Prom #2

Special Information,  like Machine Type & Size, 
Options,  Etc.,  were Programmed into  Chip #15.
Prom Board Failures usually cause "Check Sum Error" at Control Power-On, and Red-LED Lights on CPU after
Control is Running.    We Can Repair Prom Boards, 
and  Can Add Options Like RS-232 Downloading.
Ram #1  &  Ram #2  Memory Boards

Your Part Programs are Stored in these Ram Memory 2-Board Sets.
Ram #1 goes in  Slot #5,   and  Ram #2 in  Slot #6.
#400480-000   Standard 16K-Memory Ram #1
#400480-400   Standard 8K-Memory Ram #2
#400480-008   Special 12K-Memory Ram #1 for HECC80/28 Lasertool Controls Only
This is a Listing of
Types & Usage
of Electronic Circuit Boards in  Strippit Houdaille
HECC80/1 Type CNC Controls.

These CNC Controls were Used on Strippit CNC Turret Punch Press and Laser Machines
Built in the 1970's & 1980's.

HECC80/1 Type Control Panel
Looked like Picture at Right.

If Your Control 
Does Not look like This Control,  Then go to Our
"HECC80 Control Types"  
Web-Page and
Properly Identify
YOUR  CNC Control Type!
Front Panel Controller Board

#400476-000  Front Panel Controller,  Slot #7

This is the Board that  "Talks"  to All the other Parts on the Control Front Panel (the Door).
Like the Self-Scan Display,  Tapereader,
and All the Control Panel Switches & Knobs.

If You are using a  M81 Post Punch Delay Programming Code,  the Control Looks at the Switch Position on this Board to Determine if you want a  100 MSec. Delay  (Switch Down) 
or a  250 MSec. Delay  (Switch Up).

When Replacing this Board, 
Try to Insert  2 Ribbon Cables Correctly
( Brown Wire is Always  "UP" )
and  Try to Put Cables in the Correct Slot!

Lamp & Control Driver Board

This Board Originates Commands for all Solenoid Drives for Machine and all Control Front Panel Lights.   Board goes in Slot #8.
There are 3  Non-Interchangeable  Board Types;

#400464-000   The Original  Early-HECC80 Type, used Only with Small  #400504-000 Solenoid Driver Board Located in  Top of Servo Cabinet.

#400464-200   Improved HECC80/1 Type.  Connects through a Ribbon Cable to #400790-100 Output Isolator (Solenoid Driver) Board Located in the Back-Side of Control Cabinet.  This Board also has Improved Anti-Punch Circuitry so that it Won't Punch when CPU Board Loses it's  "Mind".

#400464-300  Used in FC750 and FC750/2 Machines,
also Drives a #400504-000 Solenoid Driver Board.
Machine Switch Isolator Board

#400472-000  Machine Switch Isolator Board,  
1 Type for All HECC80/1 Type Controls,  Slot #9.

All the Switch-Signals on the Standard Machine Return to the CNC Control through this Board.

One Chronic Problem with this Board is that after Many Years & Thousands of Hours of Use, the Opto Isolator Chips used on this Board Actually Grow-Weaker and Wear-Out.  
This can Cause False Switch Signals,  and the Board will Need to Rebuilt with New I.C. Chips.
We,  of Course,  Can Do this Testing & Repair.
Axis Control Board

#400470-000  Axis Control Board  
only 1 Type made for All HECC80/1 Types.

3 Boards per Control are Used;
1  in  Slot  #12  for  X-Axis
1  in  Slot  #13  for  Y-Axis
1  in  Slot  #14  for  T-Axis

These Boards Hold and Execute each 
Axis Move as the CNC Control issues each Program Move to it.
Position Comparator Board

3 Types  were Made;
#400474-000  First Type  used with 2-MHZ 
Square-Wave Resolver Excitation Board Systems

#400474-200  Second Type,  Removing Capacitor
C1 makes it a  -200 Board used with 3-MHZ Square
or Sine Wave Resolver Excitation Board Systems.

#400474-300   Third & Last Type.  No C1 Capacitor.
Resistor R4 changed to 75K to allow more Punch
Anticipation for Faster Punch Rate.  Mainly used
with 3MHZ Sine-Wave Excitation Board Systems.

3 Boards used per System,  X in Slot  #15,
Y in Slot  #16,  and  T in Slot  #17.   These Boards Compare Command Position from Axis Board  & Actual Resolver Feedback Position then Generate
a Error Signal to Phase Analog Board.
Resolver Excitation Boards

These Boards make Sine and Cosine Excitation Signals for Resolvers Located in Feedback Packages on End of each Axis Servo Motor.

Boards go in Slot #19.
3 Types of these Boards were Made;

#400468-000   2 MHZ Square-Wave Type.   Used on Early HECC80/1 Controls.   No Crystal on Board.

#400468-300   3 MHZ Square-Wave Type.
Has On-Board Crystal to Provide  3-MHZ Signal. Frequency was Increased to Improve
Servo Response and Better Servo  "Tuning".

#401272-100   3MHZ Sine-Wave Type.   Output Waveform is Sine-Wave instead of Square-Wave
of Older Boards.  This Board Greatly Increased Positioning Accuracy that Laser Machines Showed
was Lacking in Older Square-Wave Types.

Note,   These 3 Boards are  Not Interchangeable!   However,  Machines with Older Type Boards can
be Changed to Newer Type Boards to Improve Accuracy,  but  Does Require some 
Rewiring of Control Cardcage.

Late HECC80 Controls came from Factory with
3-MHZ Sine-Wave Boards,  and some Controls
were Retrofitted In-The-Field to this Type to Improve Accuracy.   Be Sure what you Have!
Phase Analog Boards
Many Different Types, Sometime Machines have the "Wrong"  Type Board in Control,  but still will Run OK.

#400482-000   Early FC1250/30/1500 Machines using
2 MHZ Square-Wave Resolver Excitation Boards.

#400482-100   Early FC1000/2 and FC750 Machines using 2MHZ Square-Wave Resolver Excitation Boards.

#400482-200   Early FC1250/45 Machines using 2 MHZ Square-Wave Resolver Excitation Boards.

#400482-300   FC1000/2 Machines using 3 MHZ Square & Sine Wave Resolver Excitation Boards.

#400482-301  FC1250/30/1500 and FC1250/45 Machines using 3 MHZ Resolver Excitation Boards.

#400482-30A   Some kind of 3MHZ Rebuilt Board ???

#400482-600   FC750/2 & FC750 Machines with
"Nibble-Drift Retrofit"  to Improve Contour Nibbling.
Uses 3MHZ Sine-Wave Resolver Excitation Board.

Phase Analog Boards  (Slot #18)  take Digital Position Error Signal from Position Comparator Board and Converts it to a Analog Signal for the Servo Drives.   Potentiometers allow each Axis to be  "Tuned" for
Variations of each Individual Machine.

Continuous Contour Board

#400888-000  Continuous Contour Circuit Board. 

Board goes in Slot #10,  and allows
Smooth Continuous Motion  in  X  and  Y Axis 
that is Required by 
Laser Cutting   and  Plasma Cutting Machines.

General Purpose I/O Board

#400790-100   General Purpose Input Output Board

Used on Machines with  Load / Unload Systems 
and  Lasers Machines  to  Handle
Extra I/O Switch and Driver Requirements.

Connects by Ribbon Cables to the
#400788-xxx  Input & Output Isolators Boards.

Goes in Slot #21.

Input & Output  Isolator Boards

#400788-000   13-Output (Solenoid Driver)  Isolator
Board used with  #400464-200 Type
Lamp & Control Driver Circuit Board.

#400788-100   24-Output  (Solenoid Driver)  Isolator Board  used with  #400790-100 General Purpose I/O Boards.    #400788-100  24-Output Board  May also
be Substituted for  #400788-000 13-Output Board.

#400788-200   24-Input Isolator Board.  
Provides 24 Opto-Isolated Inputs to Control for
Load / Unload and Laser Machine Switches.

Solenoid Driver Boards

There are 2 Versions of this Board.

#400504-000   Solenoid Driver Board.  
Used on the Original  HECC80  (NOT  HECC80/1) Controls that used  #400464-000  (Not  #400464-200) Lamp & Control Driver Circuit Board.  
This Type Driver Board was also used on 
All  FC750,  FC750/2,  and  FC75/30  Machines.

#400504-200   Solenoid Driver Board.
Used on the  NC "A" Control  Machines 
and  T-SAF30   Machines.

Master Monitor Boards

These Boards have 2 Functions;
1 -- This Board is Always On as It Starts-Up Control & Machine when You Push System-On Button.
2 -- It Monitors (With Slave Monitor Board) All of  Control & Machine  D.C. Voltages.

If 1 of the Voltages is Too High or Low,  it  will Shut-Off Control about a Second after Turn-On.
This is The Most Common Control Problem and is Caused by Either A Short-Circuit in Control or Machine, or a Bad Power Supply Board.
By Testing the 16 Test-Points on Both Master & Slave Boards, you can See which Power Supply they Did Not Like and Caused Shut-Down.

Goes in Slot S2,  There are 2 Versions of Board;

#400536-000   Standard Monitor Board.

#400536-500   Standard Monitor Board,  Except
Jumper #5 Has been Removed so it does Not Monitor for the +250VDC Supply when New-Style Display Retrofit has been Installed which
Requires that  +250 VDC Supply be Disabled.
Slave Monitor Boards

It Monitors All of Control D.C. Voltages 
(with the Master Monitor Board).  Goes in Slot S1.
If 1 of the Voltages is Too  High or Low,  it  will 
Shut-Off Control about a Second after 
Control Turn-On.  

There are Many Versions of this Board.

#400536-102   Early FC750
#400536-103   Standard FC1000's & FC1250's
#400536-104   Late FC750 & FC750/2
#400536-106   Laser Center
Power Supply #1 Board
#400538-000   Power Supply #1 Board
Board goes in  Slot#  S4.
This takes the  Raw D.C. Voltages from 
Floor-Plate and Regulates them to 
Following  6  Voltages;
Plus  &  Minus   5  Volts D.C.
Plus  &  Minus  12 Volts D.C.
Plus  &  Minus  15 Volts D.C.

Power Supplies Run-Hot!  I Mount  4-Inch Muffin Fan Under Power Supply #1  &  #2
Boards Blowing Upward on their
Black Heatsinks for Good Cooling.

Both Power Supply #1 and #2 Boards are Fairly High-Failure Items.   When Having Controls Shut-Off Problems,  we usually have  Customers Send-In these 2 Boards
for Testing,  Repairs,  &  Up-Dating.

Power Supply #2 Board

This takes Raw D.C. Voltages from Floor-Plate and Regulates them to following 4 Voltages;

Control     24 Volts D.C.
Machine   24 Volts D.C.   ( VDC-Voltage )
Machine   12 Volts D.C.   ( 1DC-Voltage )
Display  250 Volts D.C.

Board goes in  Slot# S3.
There are 2 Versions of this Board;

#400764-000  Standard Power Supply #2.

#400764-100  Standard Power Supply #2
Except that it does Not have  250 Volt Components and does Not Make 250 Volts. Used on Machines that have Display Retrofit that does Not Require 250 Volt Supply.  

Note,  you can use a  -000 Type in place of a  
-100 Board,  But you can Not use a  -100 Board in Place of a -000 if you still have Original Burroughs Display which Uses 250 Volts.

#400799-600   Standard HECC80/1 Type Keypad 
with  Prom Chip.

We Keep All of These
HECC80/1 Type  Circuit Boards  In-Stock  For-Sale
and  also 
Can Usually Test  &  Repair  Your Circuit Boards.
This page was last updated: February 4, 2023
Transition Boards

#400880-xxx  Transition Boards were made in Many Different Versions for all the Various HECC80 Controls.

These Boards were used to  "Transition"  from Hard-Wiring between the Panel Switches,  Tapereaders,  Etc.,  to 
Ribbon Cables to take Signals to
Control Boards in Cardcage.

All HECC80/1 Type Controls had 
3 of these Boards,  All were Wired Differently with Different Components.

In Top Picture at Right, 
is shown the 2 Transition Boards 
(2 are Stacked on Top of Each Other)
that are Top Left Corner of  HECC80 Control Door.

Transition Board at Lower Right is
Located Close to Tapereader in
Middle of HECC80 Control Door.

This Board has Black "Thumb Wheel"
Rotary Switch that Customers Can't
Seem to Find.   Used to Set Baud Rate
for RS-232 Communications.   We Set Switch to  "1"  for 300 Baud,  which is  ONLY Baud rate that Works in
HECC80/1 Controls.
Extender Board

#400322-000   Extender Board 

Used by Service Technicians to Extend Out of the Cardcage
a Circuit Board so that it can be
Probed & Tested  with
Voltmeters and Oscilloscopes.

Every  HECC80 Control Built 
Shipped from  Strippit Factory
with 1 of these Boards 
in it's Cardcage.
Note-1    Capacitor C1 Needs to be Removed from the 3 Boards of a  3-MHZ Square  or Sine Wave Excitation System,  or  Intermittent Zero  &  Positioning  may result.
This is a Very Common Error and I find many Controls with Incorrect Board Versions.

Note-2    The Switch is Only used for a Certain Test Procedure that You,  The Customer, 
will Never Use.   In Normal Operation,  it Does Not Matter if Switch is in Up or Down Position,  But  I Normally leave All 3 Switches  "Down".
Note!   Strippit used TI  (Texas Instruments)  Chip Sockets on Early Prom Boards.  
These were Cheap, but Not the Best Sockets available.   They sometimes did not
"Grip"  Prom Chip-Legs Tightly enough and caused  Intermittent Bad Connections.
Bad Connections could cause  "Check Sum"  Errors at Start Up and Intermittent Control
Failures  While Running  with  Red LED Lights  Lit-Up  on  CPU Board.
All Front Panel Lights would be  "ON"  as CPU Board was No longer Running.
TI Sockets have Small Rectangle-Holes where Chip-Legs are Inserted.

Later Boards were Manufactured with  "Machined-Pin"  Chip Sockets.   These Sockets can be Identified by Gold-Plated Round Holes where Chip-Legs are Inserted.   These Sockets Grips Chip-Legs Better and prevents above Problems.   Old Sockets are Very Difficult to Replace without Damaging Circuit Board,  and I advise Replacing  2 Prom Boards with New Boards with Machined Pin Sockets Sockets!
Note!  With our New Digital Oscilloscopes we can Capture & See Power Problems that we always Suspected Existed,  but  could Not See with old Analog Oscilloscopes.

Power Supply #1 & #2 Circuit Boards have some Designed-In Deficiencies that sometimes cause Power Supplies to Break into Oscillations.   These Oscillations
cause Many Intermittent Controls Problems and Control Shut-Downs.    With  Any
Intermittent Control Problems,  First Place to Start is to Send-In these 2 Boards for
Rebuilding,  Because  CNC Control Cannot Function Without Good Clean DC Power!